5 #include <asm/byteorder.h>
7 /* The latest drafts declared increase in minimal mtu up to 1280. */
9 #define IPV6_MIN_MTU 1280
13 * source interface/address selection, source routing, etc...
14 * *under construction*
19 struct in6_addr ipi6_addr;
25 struct in6_addr ifr6_addr;
30 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
31 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
32 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
45 * variable length field
54 * TLV encoded option data follows.
58 #define ipv6_destopt_hdr ipv6_opt_hdr
59 #define ipv6_hopopt_hdr ipv6_opt_hdr
62 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
66 * routing header type 0 (used in cmsghdr struct)
70 struct ipv6_rt_hdr rt_hdr;
72 struct in6_addr addr[0];
74 #define rt0_type rt_hdr.type
78 * routing header type 2
82 struct ipv6_rt_hdr rt_hdr;
86 #define rt2_type rt_hdr.type
90 * home address option in destination options header
93 struct ipv6_destopt_hao {
97 } __attribute__ ((__packed__));
102 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
103 * are glued to priority now, forming "class".
107 #if defined(__LITTLE_ENDIAN_BITFIELD)
110 #elif defined(__BIG_ENDIAN_BITFIELD)
114 #error "Please fix <asm/byteorder.h>"
122 struct in6_addr saddr;
123 struct in6_addr daddr;
127 * This structure contains configuration options per IPv6 link.
129 struct ipv6_devconf {
134 __s32 accept_redirects;
138 __s32 rtr_solicit_interval;
139 __s32 rtr_solicit_delay;
140 __s32 force_mld_version;
141 #ifdef CONFIG_IPV6_PRIVACY
143 __s32 temp_valid_lft;
144 __s32 temp_prefered_lft;
145 __s32 regen_max_retry;
146 __s32 max_desync_factor;
149 __s32 accept_ra_defrtr;
150 __s32 accept_ra_pinfo;
151 #ifdef CONFIG_IPV6_ROUTER_PREF
152 __s32 accept_ra_rtr_pref;
153 __s32 rtr_probe_interval;
154 #ifdef CONFIG_IPV6_ROUTE_INFO
155 __s32 accept_ra_rt_info_max_plen;
159 __s32 accept_source_route;
160 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
161 __s32 optimistic_dad;
166 /* index values for the variables in ipv6_devconf */
168 DEVCONF_FORWARDING = 0,
172 DEVCONF_ACCEPT_REDIRECTS,
174 DEVCONF_DAD_TRANSMITS,
175 DEVCONF_RTR_SOLICITS,
176 DEVCONF_RTR_SOLICIT_INTERVAL,
177 DEVCONF_RTR_SOLICIT_DELAY,
178 DEVCONF_USE_TEMPADDR,
179 DEVCONF_TEMP_VALID_LFT,
180 DEVCONF_TEMP_PREFERED_LFT,
181 DEVCONF_REGEN_MAX_RETRY,
182 DEVCONF_MAX_DESYNC_FACTOR,
183 DEVCONF_MAX_ADDRESSES,
184 DEVCONF_FORCE_MLD_VERSION,
185 DEVCONF_ACCEPT_RA_DEFRTR,
186 DEVCONF_ACCEPT_RA_PINFO,
187 DEVCONF_ACCEPT_RA_RTR_PREF,
188 DEVCONF_RTR_PROBE_INTERVAL,
189 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
191 DEVCONF_OPTIMISTIC_DAD,
192 DEVCONF_ACCEPT_SOURCE_ROUTE,
197 #include <linux/icmpv6.h>
198 #include <linux/tcp.h>
199 #include <linux/udp.h>
201 #include <net/inet_sock.h>
203 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
205 return (struct ipv6hdr *)skb_network_header(skb);
208 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
210 return (struct ipv6hdr *)skb_transport_header(skb);
214 This structure contains results of exthdrs parsing
215 as offsets from skb->nh.
218 struct inet6_skb_parm {
228 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
232 #define IP6SKB_XFRM_TRANSFORMED 1
235 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
237 static inline int inet6_iif(const struct sk_buff *skb)
239 return IP6CB(skb)->iif;
242 struct inet6_request_sock {
243 struct in6_addr loc_addr;
244 struct in6_addr rmt_addr;
245 struct sk_buff *pktopts;
249 struct tcp6_request_sock {
250 struct tcp_request_sock tcp6rsk_tcp;
251 struct inet6_request_sock tcp6rsk_inet6;
254 struct ipv6_mc_socklist;
255 struct ipv6_ac_socklist;
256 struct ipv6_fl_socklist;
259 * struct ipv6_pinfo - ipv6 private area
261 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
262 * this _must_ be the last member, so that inet6_sk_generic
263 * is able to calculate its offset from the base struct sock
264 * by using the struct proto->slab_obj_size member. -acme
267 struct in6_addr saddr;
268 struct in6_addr rcv_saddr;
269 struct in6_addr daddr;
270 struct in6_addr *daddr_cache;
271 #ifdef CONFIG_IPV6_SUBTREES
272 struct in6_addr *saddr_cache;
280 * Omit one shift by by putting the signed field at MSB.
282 #if defined(__BIG_ENDIAN_BITFIELD)
290 #if defined(__BIG_ENDIAN_BITFIELD)
291 /* Packed in 16bits. */
302 /* pktoption flags */
330 struct ipv6_mc_socklist *ipv6_mc_list;
331 struct ipv6_ac_socklist *ipv6_ac_list;
332 struct ipv6_fl_socklist *ipv6_fl_list;
334 struct ipv6_txoptions *opt;
335 struct sk_buff *pktoptions;
337 struct ipv6_txoptions *opt;
343 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
345 /* inet_sock has to be the first member of raw6_sock */
346 struct inet_sock inet;
347 __u32 checksum; /* perform checksum */
348 __u32 offset; /* checksum offset */
349 struct icmp6_filter filter;
350 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
351 struct ipv6_pinfo inet6;
356 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
357 struct ipv6_pinfo inet6;
362 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
363 struct ipv6_pinfo inet6;
366 extern int inet6_sk_rebuild_header(struct sock *sk);
368 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
369 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
371 return inet_sk(__sk)->pinet6;
374 static inline struct inet6_request_sock *
375 inet6_rsk(const struct request_sock *rsk)
377 return (struct inet6_request_sock *)(((u8 *)rsk) +
378 inet_rsk(rsk)->inet6_rsk_offset);
381 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
383 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
386 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
388 struct request_sock *req = reqsk_alloc(ops);
391 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
396 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
398 return (struct raw6_sock *)sk;
401 static inline void inet_sk_copy_descendant(struct sock *sk_to,
402 const struct sock *sk_from)
404 int ancestor_size = sizeof(struct inet_sock);
406 if (sk_from->sk_family == PF_INET6)
407 ancestor_size += sizeof(struct ipv6_pinfo);
409 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
412 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
413 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
415 struct inet6_timewait_sock {
416 struct in6_addr tw_v6_daddr;
417 struct in6_addr tw_v6_rcv_saddr;
420 struct tcp6_timewait_sock {
421 struct tcp_timewait_sock tcp6tw_tcp;
422 struct inet6_timewait_sock tcp6tw_inet6;
425 static inline u16 inet6_tw_offset(const struct proto *prot)
427 return prot->twsk_prot->twsk_obj_size -
428 sizeof(struct inet6_timewait_sock);
431 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
433 return (struct inet6_timewait_sock *)(((u8 *)sk) +
434 inet_twsk(sk)->tw_ipv6_offset);
437 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
439 return likely(sk->sk_state != TCP_TIME_WAIT) ?
440 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
443 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
445 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
448 static inline int inet_v6_ipv6only(const struct sock *sk)
450 return likely(sk->sk_state != TCP_TIME_WAIT) ?
451 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
454 #define __ipv6_only_sock(sk) 0
455 #define ipv6_only_sock(sk) 0
457 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
462 static inline struct inet6_request_sock *
463 inet6_rsk(const struct request_sock *rsk)
468 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
473 #define __inet6_rcv_saddr(__sk) NULL
474 #define inet6_rcv_saddr(__sk) NULL
475 #define tcp_twsk_ipv6only(__sk) 0
476 #define inet_v6_ipv6only(__sk) 0
477 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
479 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
480 (((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net)) && \
481 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \
482 ((__sk)->sk_family == AF_INET6) && \
483 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
484 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
485 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
487 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
488 (((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net)) && \
489 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
490 ((__sk)->sk_family == PF_INET6) && \
491 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
492 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
493 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
495 #endif /* __KERNEL__ */